OnRobot 3FG15 Finger Gripper

The OnRobot 3FG15 Finger Gripper is an electric 3-finger gripper designed for centric gripping of cylindrical parts and for machine tending applications involving parts of varying sizes.

With a long stroke, self-centering capability, and a load capacity of up to 15 kg, it is suitable for CNC lathes, handling round workpieces, and processes where stable positioning is essential.

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3-finger gripper for cylindrical parts with self-centering capability

The OnRobot 3FG15 Finger Gripper is specifically designed for handling cylindrical parts and for applications where centric positioning is critical. Its 3-point contact configuration makes it ideal for machine tending on CNC lathes, where gripping repeatability and proper part alignment directly influence the outcome of the process.

Longer travel for better flexibility

With a stroke of up to 150 mm, the model can handle a wide range of sizes without requiring frequent equipment changes. This makes it useful in production environments where there are variations in parts or where the same gripper needs to handle multiple part sizes.

Internal or external mounting, depending on the application

The 3FG15 can operate with both external and internal clamping, which expands its range of applications. In practice, this provides greater flexibility in application design and simplifies the automation of processes that would otherwise require two different clamping solutions.

Quick to implement and easy to move between applications

Like all OnRobot products, the gripper is designed for easy integration and user-friendly software. For companies looking for a straightforward solution for cylindrical parts, without the need for costly custom development, the 3FG15 is a very logical and efficient choice.

Where it makes sense

  • machine tending for CNC lathes
  • handling of cylindrical parts
  • applications requiring centric clamping and precise positioning
  • processes in which the same solution must cover multiple diameters
Industries

Industrial production

Model 3FG15
Device type 3-finger electric center gripper
Payload (friction grip) 10 kg (22 lb)
Payload (flexible gripping) 8 kg (17 lb)
Payload (form-fit clamping) 15 kg (33 lb)
External mounting diameter 4–152 mm
Internal mounting diameter 35–176 mm
Finger position resolution 0.1 mm
Diameter repeatability 0.1–0.2 mm
Motor torque on the finger platform 5.3 Nm
Grip strength (normal grip) 10–240 N
Grip strength (flexible grip) 10–140 N
Adjustable clamping force 1–100%
Clamping speed (diameter adjustment) 125 mm/s
Curing time 500 ms
Minimal finger movement 4 mm
Power failure protection Yes
Engine Integrated electric BLDC motor
Protection rating IP67
Dimensions (L × W × Ø) 156 × 158 × 180 mm
Weight 1.15 kg
Power supply 20–25 V DC
Current consumption 43–1,500 mA
Operating temperature 5–50 °C
Storage temperature 0–60 °C
Operating humidity 0–95% (non-condensing)
Warranty 3 years or 3,000,000 cycles
File name File size File type
Technical Specifications for the OnRobot 3FG15 Finger Gripper
.pdf, 1 MB
1 MB PDF

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OnRobot 3FG15 Finger Gripper
OnRobot 3FG15 Finger Gripper

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